妇女卵巢功能逐渐衰退，生殖器官开始萎缩并向衰退过渡的时期称为
A．新生儿期B．幼年期C．青春期D．性成熟期E．更年期
参考答案：E
Tom often gets some letters from his pen pal. The underlined word “gets” can be replaced by “ ”.
A．becomes
B．receives
C．arrives
D．takes
电流互感器的一次绕组必须与（）串联
A.电线
B.负载线
C.地线
D.相线
